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Pediatric Chief Residents

chief resident

Johni Armstrong, MD

Bio
Dr. Armstrong was born and raised in Dyersburg, TN, and has remained in Tennessee since then for undergraduate at Lee University and medical school at UTHSC. She enjoyed her medical school experience so much that she decided to stay on at UTHSC for pediatric residency and a chief resident year. She has a love for quality improvement and medical education and hopes to continue furthering those skills in Pediatric Hospital Medicine fellowship. In her free time, she enjoys trying new restaurants in Memphis with her husband Grant, taking on fun sewing projects, and going to pilates classes.
chief resident

Britt Bolin, DO

Bio
Dr. Bolin is a born and raised Tennessean who chose to return after a brief stint in SC for medical school. She chose UT/Le Bonheur because she loved the sense of community and wanted to serve a wide variety of patients and see a wide range of pathologies. During her residency, she enjoyed participating in advocacy and outreach efforts in the community, as well as at the state level. She was chosen to stay on as a chief resident to serve and give back to the program that helped shape her medical career. When she's not at work, you can find her at Cyclebar, walking in Overton, the Orpheum for a show, or at home with her cat, Binx. 
chief resident

Kitty Foos, MD

Bio
Dr. Foos was born and raised in Albuquerque, NM, coming to Memphis after attending University of New Mexico for undergrad and medical school. Initially drawn to UTHSC for the diversity of training and large stand-alone children's hospital, she fell in love with Le Bonheur and stayed for another year as Chief Resident. She is passionate about advocacy medical education and will continuing her training with a fellowship in Child Abuse Pediatrics next year. Outside of medicine, she enjoys exploring the Memphis food and drink scene, staying active with CrossFit and walks along the Mississippi, and baking new creations with her sourdough Doughlene. 
Aug 14, 2026